Learn about electricity and signals.

• Remember AC and DC electricity
• Remember Electrical safety
• Understand how to model power consumption
• Understand EMI, Ground loops, isolation and shielding
• Understand Communication
• Understand cables and remembering
  • Single ended
  • differential
  • twisted pair
  • coax/twinax
  • fiber
  • balancing
  • bandwidth
  • current limits
• Understanding rechargeable batteries and remebering
  • Capacity
  • currentl limits
  • Charging
  • safety
  • disposal